Share this article

Earlier this week, Nick and Olivia were both spotted on two separate locations in New York City, but while the beauty queen was all smiles, the singer looked glum.

A source told DailyMail.com that Nick had booked himself into one hotel and the former Miss USA 2012 had arranged to stay in totally different lodgings.

Single again? Nick has not been seen in public with his girlfriend Olivia Culpo for nearly a month, and allegedly stayed in separate hotels in New York this week, fuelling rumours that the couple have split

Back in black: Nick rocked a casual all-black outfit as he entered LAX on Saturday, wearing jeans and a top underneath a leather jacket

The last time Nick and Olivia were spotted together was on May 17 at the 2015 Billboard Music Awards in Las Vegas, Nevada.

Also on Thursday, it was revealed that Nick will replace Iggy Azalea at Saturday's Pittsburgh gay pride concert.

The star said in a statement: 'When I heard about the difficult position Pittsburgh Pride was in just days before their event, I knew I had to find a way to help.

Missing somebody? Nick Jonas was seen eating lunch with three friends in NYC on Thursday amid rumours that he and beauty queen girlfriend Olivia Culpo have split

'Separate hotels': Nick - pictured leaving his Tribeca, NYC hotel on Thursday - is said to be staying in a different hotel than where Olivia is staying

'I'm excited to do what I can to support the LGBT community in Pittsburgh, and I look forward to seeing you this Saturday as we celebrate together.'

Despite being brought up in a strict faith-based family that did not even believe in sex before marriage, Nick has been very pro gay marriage and has actively courted gay fans through club performances and interviews.

The 22-year-old former Jonas Brothers also plays a gay boxer on the DirecTV series Kingdom.

Over? Nick and Olivia were pictured together at the Billboard Music Awards in Las Vegas on May 17 but - as Gwyneth Paltrow described her split from Chris Martin - appear to be making a 'conscious uncoupling'